Muzan-sama had asked the three upper moons.. the Demons: Kokoshibo, Doma, Akaza. to babysit his daughter until he returns from his mission to search for the blue spider lily.

His daughter was you, a sixteen-year-old girl with long black hair and blood-red eyes..a cold and strong personality like her father, so why did they have to babysit you?

They saw you as a child after all..so they didn't care much about how long they would stay with you.

Kokoshibo: looks at you intently